S.D. Codified Laws § 41-12-9
It is a Class 1 misdemeanor for any person to possess or control, or to place, keep, or maintain in any of the public waters of this state any trammel or gill net, seine, or other similar device for capturing fish. It is a Class 1 misdemeanor for any person to take in any of the public waters of this state for any purpose whatever, any fish at any time by the erection of any weir, dam, or artificial obstruction or by the use of any trammel or gill net, trap, or similar device, or to place, keep, or maintain the same in any of the public waters of this state. The Department of Game, Fish and Parks may authorize private landowners to use specified devices to take minnows or control undesirable or overpopulated species of fish in their private waters.
SDCL 41-12-9